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Abstract:

An injection mold for molding an electronic product which has a terminal
includes a movable mold, a first sliding block levelly defining a
through-hole, a second sliding block, a supporting pole and a stationary
mold. A top of the movable mold defines an opening of which a bottom
defines a fastening hole for fastening a bottom of the terminal therein.
An inner sidewall of the second sliding block defines a groove for
restraining a top of the terminal. The first and second sliding blocks
are located at two opposite sides of the opening to together define a
cavity for molding the electronic product. The supporting pole is movably
inserted in the through-hole and stretches into the cavity to resist
against the top of the terminal. The stationary mold is positioned on the
first and second sliding blocks, and defines a sprue channel connected
with the cavity.

Claims:

1. An injection mold for molding an electronic product which has a
terminal, comprising: a movable mold, a top of the movable mold defining
an opening, a portion of a bottom of the opening extending downward to
form a fastening hole for fastening a bottom end of the terminal therein;
a first sliding block movably mounted on one side of a top of the movable
mold, the first sliding block defining a through-hole levelly penetrating
therethrough; a second sliding block movably mounted on the other side of
the top of the movable mold, an inner sidewall of the second sliding
block facing the first sliding block defining a groove vertically
penetrating through a bottom thereof, the first and second sliding blocks
being located at two opposite sides of the opening and capable of moving
towards each other to make a top end of the terminal restrained in the
groove, an inner sidewall of the first sliding block being further spaced
from the top end of the terminal and the second sliding block to
cooperate with the opening to together define a cavity, the through-hole
having an inner end thereof connected with the cavity; a supporting pole
movably inserted in the through-hole and further stretching into the
cavity to resist against a side of the top end of the terminal for
further clipping the top end of the terminal between the supporting pole
and the second sliding block; and a stationary mold capable of being
positioned on the first and second sliding blocks to cooperate with the
cavity for molding the electronic product, the stationary mold defining a
sprue channel connected with the cavity.

2. The injection mold as claimed in claim 1, further comprising two
ejector pins, a bottom of the movable mold abreast defining two ejector
pin holes penetrating through the movable mold and communicating with a
bottom of the opening, the ejector pins being movably inserted in the
ejector pin holes respectively for ejecting the electronic product upward
out of the cavity.

3. The injection mold as claimed in claim 2, wherein the ejector pin
holes are opened at two opposite sides of the fastening hole.

4. The injection mold as claimed in claim 1, wherein the movable mold
includes a movable mold plate and a movable mold core disposed in a top
of the movable mold plate, the opening is opened in a top of the movable
mold core.

Description:

BACKGROUND OF THE INVENTION

[0001] 1. Field of the Invention

[0002] The present invention generally relates to an injection mold, and
more particularly to an injection mold capable of fastening a terminal
therein.

[0003] 2. The Related Art

[0004] With the fast development of electronic technology, volume of the
electronic product is becoming smaller and more delicate so that
components of the electronic product are fragile and easily deformed. A
traditional injection mold for fastening a terminal of the electronic
product therein generally includes a stationary mold, a movable mold, a
first sliding block and a second sliding block. When the injection mold
is used to mold the electronic product with the terminal embedded
therein, the first and second sliding blocks are movably mounted on two
opposite sides of a top of the movable mold and spaced from each other.
The stationary mold defines a sprue channel, and a middle of a top of the
movable mold defines a fastening hole. A bottom end of the terminal is
inserted in the fastening hole, and a top end of the terminal stretches
between the first sliding block and the second sliding block. The
stationary mold is disposed on tops of the first and second sliding
blocks. So a cavity is formed among the stationary mold, the first and
second sliding blocks and the movable mold. Then thermoplastic resins are
injected into the cavity through the sprue channel to surround the
terminal for molding the electronic product.

[0005] However, because the top end of the terminal stretches in the
cavity without being restrained by any structures and the terminal is
generally slim and small, as a result, the terminal is apt to sway
randomly and even deform under the injection attach of the thermoplastic
resins. As a result, the electronic product with the terminal embedded
therein often has a lower production rate and the manufacturing cost
thereof is accordingly increased.

SUMMARY OF THE INVENTION

[0006] An object of the present invention is to provide an injection mold
for molding an electronic product which has a terminal. The injection
mold includes a movable mold, a first sliding block, a second sliding
block, a supporting pole and a stationary mold. A top of the movable mold
defines an opening. A portion of a bottom of the opening extends downward
to form a fastening hole for fastening a bottom end of the terminal
therein. The first sliding block is movably mounted on one side of a top
of the movable mold. The first sliding block defines a through-hole
levelly penetrating therethrough. The second sliding block is movably
mounted on the other side of the top of the movable mold. An inner
sidewall of the second sliding block facing the first sliding block
defines a groove vertically penetrating through a bottom thereof. The
first and second sliding blocks are located at two opposite sides of the
opening and capable of moving towards each other to make a top end of the
terminal restrained in the groove. An inner sidewall of the first sliding
block is further spaced from the top end of the terminal and the second
sliding block to cooperate with the opening to together define a cavity.
The through-hole has an inner end thereof connected with the cavity. The
supporting pole is movably inserted in the through-hole and further
stretches into the cavity to resist against a side of the top end of the
terminal for further clipping the top end of the terminal between the
supporting pole and the second sliding block. The stationary mold is
capable of being positioned on the first and second sliding blocks to
cooperate with the cavity for molding the electronic product. The
stationary mold defines a sprue channel connected with the cavity.

[0007] As described above, the bottom end of the terminal is inserted in
the fastening hole through the cavity, and the top end of the terminal is
restrained in the groove to avoid the terminal moving upward or downward
in the cavity. Moreover, the supporting pole is stretched into the cavity
to resist against the top end of the terminal and clip the top end of the
terminal between the supporting pole and the second sliding block, so
that can further prevent the terminal randomly swaying in the cavity. So
the terminal is located in the cavity firmly. As a result, a deformation
of the electronic product is avoided accordingly in process of injecting
thermoplastic resins into the cavity. Furthermore, production rate of the
electronic product can be assured, and cost of manufacturing the
electronic product is lowered.

BRIEF DESCRIPTION OF THE DRAWINGS

[0008] The present invention will be apparent to those skilled in the art
by reading the following description, with reference to the attached
drawings, in which:

[0009] FIG. 1 is a cross-sectional view of an injection mold according to
the present invention, wherein a terminal is mounted in the injection
mold; and

[0010]FIG. 2 is a cross-sectional view of the injection mold of FIG. 1,
wherein a stationary mold is removed away, and an electronic product is
ejected out of the injection mold.

DETAILED DESCRIPTION OF THE EMBODIMENT

[0011] Referring to FIGS. 1-2, an injection mold 100 for molding an
electronic product 60 therein includes a stationary mold 10, a movable
mold 20, a first sliding block 30, a second sliding block 40, a
supporting pole 50 and two ejector pins 80 mounted on a fixing plate (not
shown).

[0012] Referring to FIGS. 1-2, the movable mold 20 has a movable mold
plate 21 and a movable mold core 22 mounted in a middle of a top of the
movable mold plate 21. A middle of a top of the movable mold core 22
defines an opening 23. A middle of a bottom of the opening 23 extends
downward to form a fastening hole 24. The movable mold 20 abreast defines
two ejector pin holes 25 each extending vertically to penetrate through
the movable mold plate 21 and the movable mold core 22 and communicate
with the opening 23. The ejector pin holes 25 are further opened at two
opposite sides of the fastening hole 24. A top of the stationary mold 10
defines a sprue channel 90 vertically penetrating therethrough. The first
sliding block 30 and the second sliding block 40 are slidably disposed on
the movable mold 20 and located at two opposite sides of the opening 23
to move towards or away from each other. A substantial middle of the
first sliding block 30 defines a through-hole 31 levelly penetrating
through the first sliding block 30. An upper portion of an inner sidewall
of the second sliding block 40 facing the first sliding block 30 is cut
off to form a groove 41 vertically penetrating through a bottom of the
second sliding block 40.

[0013] Referring to FIG. 1, each of the ejector pins 80 is of an elongated
shape. A bottom end of the ejector pin 80 is fixed on the fixing plate
and a top end of the ejector pin 80 is inserted in the corresponding
ejector pin hole 25 of the movable mold 20. The fixing plate can move
upward and downward with respect to the movable mold plate 21 to drive
the ejector pins 80 to move up and down along the corresponding ejector
pin holes 25.

[0014] Referring to FIGS. 1-2, when the injection mold 100 is used to mold
the electronic product 60 with a terminal 61 embedded therein, a bottom
end of the terminal 61 is inserted in the fastening hole 24 through the
opening 23 and a top end of the terminal 61 projects out of the opening
23 to be located between the first and second sliding blocks 30, 40. The
first and second sliding blocks 30, 40 move towards each other until
insides of bottoms thereof are adjacent to the two opposite sides of the
opening 23. At this time, the top end of the terminal 61 is received in
the groove 41 with a top head thereof abutting against a top sidewall of
groove 41 and a side thereof abutting against an inner sidewall of the
groove 41 to avoid the terminal 61 moving upward or downward. Moreover,
the tops of the first and second sliding blocks 30, 40 are spaced from
each other to cooperate with the opening 23 to together define a cavity
70. The through-hole 31 has an inner end thereof connected with the
cavity 70. Then the stationary mold 10 is covered on the first and second
sliding blocks 30, 40, with a bottom of the sprue channel 90 connected
with the cavity 70. The fixing plate moves upward to drive the ejector
pins 80 to slide along the corresponding ejector pin holes 25, until top
heads of the ejector pins 80 are level with a bottom face of the opening
23. The supporting pole 50 is movably inserted in the through-hole 31 and
stretched into the cavity 70 to resist against another side of the top
end of the terminal 61 and clip the top end of the terminal 61 between
the supporting pole 50 and the second sliding block 40, so as to further
prevent the terminal 61 randomly swaying in the cavity 70. So the
terminal 61 can be located in the cavity 70 of the injection mold 100
firmly. Then, a number of thermoplastic resins are injected into the
cavity 70 through the sprue channel 90 to mold the electronic product 60
in the cavity 70, wherein the electronic product 60 includes the terminal
61 and an insulating housing 62 molded around the terminal 61.

[0015] Referring to FIGS. 1-2, when the injection mold 100 is opened, the
stationary mold 10 moves upward, and the first sliding block 30 and the
second sliding block 40 move away from each other. The supporting pole 50
is retracted to the through-hole 31. At last, the electronic product 60
is ejected upward out of the cavity 70 of the injection mold 100 by the
ejector pins 80.

[0016] As described above, the bottom end of the terminal 61 is inserted
in the fastening hole 24 through the cavity 70, and the top end of the
terminal 61 is restrained in the groove 41 with the top head thereof
abutting against the top sidewall of the groove 41 and the side thereof
abutting against the inner sidewall of the groove 41 to avoid the
terminal 61 moving upward or downward in the cavity 70. Moreover, the
supporting pole 50 is stretched into the cavity 70 to resist against the
another side of the top end of the terminal 61 and clip the top end of
the terminal 61 between the supporting pole 50 and the second sliding
block 40, so that can further prevent the terminal 61 randomly swaying in
the cavity 70. So the terminal 61 is located in the cavity 70 firmly. As
a result, a deformation of the terminal 61 is avoided accordingly in
process of injecting the thermoplastic resins into the cavity 70.
Furthermore, production rate of the electronic product 60 can be assured,
and cost of manufacturing the electronic product 60 is lowered.

Patent applications by Kun-Hsueh Chiang, New Taipei City TW

Patent applications by Xian-Yun Wang, Dong-Guan CN

Patent applications by Xiao-Ping Wu, Dong-Guan CN

Patent applications by CHENG UEI PRECISION INDUSTRY CO., LTD.

Patent applications in class DISTINCT MEANS TO FEED, SUPPORT OR MANIPULATE PREFORM STOCK AND MEANS FOR SHAPING FLUENT OR BULK STOCK TO FORM UNITED PRODUCT

Patent applications in all subclasses DISTINCT MEANS TO FEED, SUPPORT OR MANIPULATE PREFORM STOCK AND MEANS FOR SHAPING FLUENT OR BULK STOCK TO FORM UNITED PRODUCT